Thermally bonded viral barrier composite

B - Operations – Transporting – 32 – B

Patent

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Details

B32B 5/18 (2006.01) A41D 13/12 (2006.01) A41D 27/24 (2006.01) A41D 31/00 (2006.01) A61L 15/24 (2006.01) A61L 15/52 (2006.01) A61L 31/04 (2006.01) A61L 31/14 (2006.01) B29C 65/08 (2006.01) B32B 5/22 (2006.01) B32B 27/02 (2006.01) B32B 27/12 (2006.01) B32B 27/32 (2006.01) B32B 38/04 (2006.01) D04H 13/00 (2006.01) D06H 5/00 (2006.01) D06M 17/00 (2006.01)

Patent

CA 2214603

A viral barrier composite of a thermo-plastic film (24) thermally bonded on at least one side thereof to a breathable thermoplastic web (22), and method for making the same. The viral barrier composite has viral barrier properties, a moisture vapor transmission rate of at least 700 g/m2/24 hours and a bond strength between the thermoplastic film breath-able thermoplastic web of at least 0.07 N/cm. The viral barrier composite is formed by calen-dering an assembly comprising a thermoplastic film (24) and a breathable thermoplastic web (22) between a smooth roll (28) and a pattern roll (26). The viral barrier composite may be used for constructing articles of protective ap-parel.

La présente invention concerne un composite à effet de barrière antivirale, ce composite étant réalisé à partir d'un film thermoplastique (24) thermosoudé sur l'une au moins de ses faces contre une bande thermoplastique perméable aux gaz (22). L'invention concerne également le procédé de fabrication correspondant. Le composite barrière antivirale est caractérisé par un effet de barrière antivirale, une perméabilité à l'humidité d'au moins 700 g/m<2>/24 heures, et une résistance d'adhésion d'au moins 0,07 N/cm entre le film thermoplastique et la bande thermoplastique perméable aux gaz. Le procédé de formation du composite barrière antivirale consiste à calandrer entre un cylindre lisse (28) et un cylindre gravé (26) un ensemble constitué d'un film thermoplastique (24) et d'une bande thermoplastique perméable aux gaz (22). Ce composite à effet de barrière antivirale convient à la réalisation d'articles tels que des vêtements de protection.

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